Influence of Tetramethylammonium Hydroxide Cation Concentration on Omega Zeolite Crystal Size

Muwafaq M. Yahya; Rana T. AL-Rubaye; Aqeel A.  Al-Ani

doi:10.14500/aro.11978

Muwafaq M. Yahya Department of chemical Engineering, Faculty of Engineering, Baghdad University, Baghdad – F.R. Iraq https://orcid.org/0009-0001-5938-1376
Rana T. AL-Rubaye Department of chemical Engineering, Faculty of Engineering, Baghdad University, Baghdad – F.R. Iraq https://orcid.org/0009-0001-5938-1376
Aqeel A. Al-Ani Ministry of Oil ,Oil Marketing Company (SOMO) Baghdad , Baghdad – F.R. Iraq https://orcid.org/0009-0005-7744-3971

DOI: https://doi.org/10.14500/aro.11978

Keywords: Nanocrystal, Omega zeolite, Sodium aluminosilicate, Tetramethylammonium hydroxide

Abstract

Omega zeolite nanocrystals can be synthesized hydrothermally from a sodium aluminosilicate solution characterized by a 5.96 Na₂O/Al₂O₃ constant molar ratio, carried out at a maximum temperature of about 100°C for 4 days after aging at room temperature for 3 days, utilizing tetramethylammonium hydroxide (TMA-OH) at molar ratios of 0.36, 0.48, and 0.61. By using different analysis techniques, such as X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy, and atomic force microscopy, the physical characteristics of the nanosized omega zeolite crystals can be identified, and the omega zeolite crystal size can be regulated between 34 and 100 nm. In this research paper, the process of creating a uniform aluminosilicate solution with TMA-OH, followed by forming a solid aluminosilicate gel with adjusted elemental composition, reveals the significance of the TMA-OH/Al₂O₃ mole ratio for synthesizing nanocrystalline omega zeolite aggregates.

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